Cutting-tool.



C. J. JOHNSON.

CUTTING TOOL.

APPLICATION FILED JAN.31,1913.

Patented Sept. 22, 1914.

lnvefitor- Witnesses:

I Charles J. Johnso l! His fitter-r35.

THE NORRIS PETERS 60., PuonrLlTHc wAsHINcmN, 0. c.

' m nnns a. Jorrnsoiv, or. nnwvonig-n. Y., nssrenonmo cnnnrtan nnno'rnro 1,111,388! 5.31 a v p e i ApplicationfiledJanuarySI,1913.' 'seria nav ia4idy comrlmmnoonronia'rron or new YORK.

V v CUTTING-moon.

170 it whom/it mag concern: v j v I Be it known that I, CHAR nsJ J OHhTfiON a citizen of the United States, residing in he b ug of nhat a S at nit w York, have invented. certain new and useful Improvements in Cutting-Tools, lot which n the following is a specification;

My invention has referenceto a cutting 1 tool,' and has for its object the provisiono'fja tool of this character which is cheappc'omlpact and efiicient in operatlon.

Q. My 'nvention is partlcularly useful for cutting armor from cables, although itwill be obvious thatit sisnot limited to suclruse.

Fora fuller understanding o'f myinven I tion, reference 1s had torthe accompanying drawing, .which-- Figure "1 is a fro elevation ofthe supporting head and the gear which'is mountedfthereon.

The to 1 's shown supported vise composed of two clamping'jaws, l and 2,

vise by an arm 7,*.the outer end of which is" rjournaled in a cylindrical bearing 8 formed inthe'head 6 and by which the head 5 may be given avrotary moveinent with 'ref-" ere'n'ce to'the arm]. Thehead is made rigid with the arnif? means of aclamping bolt 9, and thef'arm 7 'isflpivotally connected to the vise by a;suitable adjustable head 10.

1A gear wheel llsecured to a bearing "sleeve 12 'and here shown integral therewith, is provided at itsinn'er endw tha conlcal sur:

face 13. Acylindric'al bearing member 14:

' Y is interposedbetweenthe sleeve12 and the head 6.} A chuck isllocate d within the sleeve l2 and comprises s'eries'of disconnected gripping jaws 15 provided atfthjeir outer ends with tapering surfaces 16'Qwhich are adapted to engage theconical surface 13 of the'sleeve ll 2. The, inner edges of thesej'aws are provided with. recesses 17., within which is" received a spring ringfl8 for the' purpose of opening th-efj aws when they are out [cf engagementlwithgjthe worln; The inner ends ofthe jaws ar'ejshap'ed to fo'rmhoolzsw, and

a 'cyl-indrical sleeve 29 is provided with an annular groove 22 whose "shoulders are Specifieati'onof Letters Patent;

' meane 212 1914;

clamping jaws; :1 A longitudinal movement is given to the cylinder 20 and to thegjaws 15 by a hand wheel 21 which forms a screw threaded connection with the cylindrical member 20. i i

reciprocating jvmember 23 having suitable handgrips 24 and 25 is provided with two arms'ee and P/Z, the latter of which is in the for-m of a rack-bar which engages the gear wheel 11. The inner end of the bar 27 is provided with'an upturned shank 28 by which-the rack bar is securedto the hand member by a bolt29. -A cutting edge '30, which iisthere shown as aihacl r-saw, .is detachahlysecured to the arml26 V A. clamping plate 311s secured against the faceof theto'olby a clamping b olt32,.which' holds the clamping plate rigidly, against a segmental lug33 extending outwardly from the head 6 and against the eylindricalbean ing member 8 of: the head 6. The upperv end of'the clamping'plateiis formed into a-yoke,

the, upstanding jlegsf3l of which are pro- "vided with inwardlyfextending bosses 34t wh1ch,2w1th outwardlyextending lugs 35',

which project fromthe' top of the head 6, .form a guide for the arm26. The'spa'ce between the two legs 31 accommodates the work. Antrfriction rollers .36 are carried enthe inner face of the pla'te3l for support ing the work. The worki'shere shownin S Vl'liChfWii/ h the front-of the head 6 and the segmental lug 33, forinjaflguideway for the To operate the tool the work is gripped in position, by turning up the hand wheel, 21 and the reciprocating member 23 ,moved back and forth across the work with the hack-saw 30 engaging-the periphery of the adapted to' engage the'ho olred the form of an armored cable. The arm 27- -'1s held inpo'sitionby the clamping plate 31,

work, which is caused to rotate in the opposite direction'by the'rack-bar acting upon gear 11, so that the periphery of the work is i always moving in opposition to ithe move ment of the cuttlng edge, v which is obviously a great;a.dvaht g1e. Furthermore, the ratio ofthe angular velocity of the workltot the movement of the reciprocating member???) 1n whichever" (,llTGClJlOIL the reciprocating inember isniovingj constant and this insures a uniform depth for the kerf, which is obviously a great 1- advanta'ge when the tool is used foreutting the armor. from-insulated cables. At the same'time, as the work is gripped closely to the cutting edge, it is pos sible tocut the armor smoothly and without leaving any protruding burs which are so liable to result when armoris cut. It is also obvious that the tool embodyingmy invention-may conveniently be used on any portion of the cable, as the longitudinal reciprocating motion necessary for this operation maytakeplalce either at the end of the cable or 'at a distance therefrom, which under some-circiunstances .is a desirable feature.

fWhile I have shown my invention as hand-operated, I do not desire to limit my invention to this feature, as it is apparent that it could be automatically operated.

Furthermore, while I have shown my invention in connection with an armored cable, it is obvious that the tool could be'used for other kinds of work, for example, plain metalbars or pipes. I Y Y Inaccordance with the provisions of the patentstatutes, vI have, described the prim cip'le of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but

I desire to have it understood that the apparatus shownisonlyillustrative and that the invention can becarried outby other means within'the scope of my claims.

WVhat I claim as new and desire to secure by Letters Patent of the United States, is 2+ 1', In a cutting tool, the combination of rotatably-mounted meansfor gripping the work, means for holding a cutting edge adapted to be reciprocated' across the work, and means for rotating said gripping means and the work at least one complete revolution in opposition to the movement of said cutting edge during each full cutting movement of the latter'at a speed bearing a constant relation thereto.

2. Ina cutting tool, the combination of rotatably mounted means for gripping the work, means for holdingfla cutting edge adapted to be reciprocated across the work, and means for rotating said gripping means andflthe work at least one complete revolution in opposition to the movement of said cutting edge during each full movement of the latter each way. 1

3. In a cutting tool, the combination of a r'otatably mounted chuck. for holding the work, means for holding a cutting edge ment'of the cutting edge. g

5. In a cutting tool, the combination of a and: the work connected with said holding means so as to be operated by the cutting movement of the same and actingto rotate the work onlv in opposition. to the move-* i 7 O rotatably mounted clutch for the work, a re ciprocating cutting edge, and meansfcon trolled by the movement of the cutting edge i'or causing the clutch tomake at least one complete revolution during. each stroke for.

the cutting edge.

6. In a cutting toolfthe combination'ofy rotatably mounted means for gripping the work, means'for'holding a cutting edgefree' to be reciproc'ated 'a'crossthe work. in strokes of any length less than that of said edge, and means forrotating said gripping'means and the work so connected with said holding means as to be operated by the cutting movement of the same without interference with the freedom of variation'of the length. of its strokes and as to rotate the work only in opposition to the: movement; of the cut-' ting edge, regardless of the length of the stroke.

7. In a cutting tool,- asup porting'heaia" chuck revolubly mounted thereon for holdingthe work, member adapted to'b'ere ciprocated across the work provided with two parallel arms, one of which is provided g with a cutting edgefor engaging the. work and the other of which 'is'adapted to rotat the work: A,

j. 8. acutting tool, a supporting head, a

chuck revolublymounted thereon for hold? ing the work, a gear secured thereto, and a reciprocating member; provided with two parallel arms, one of which is provided. with a cutting edge for engaging the work and.

the other of which is provided with a rack for engaging said gear.' I f a 9. In a cutting tool, a supportinghead', a

chuck revolubly mounted thereonfor hold-i ing the work, a gear secured thereto and concentric therewith, a reciprocating member provided with hand grips and two parallel arms, onevof which is providedwith a hack saw forengaging the work and the other of a which is provided iwith a rack adapted 'to' iio engage said gear on lthe-"sideoppositethat edge of the work engaged by the hack saw,

whereby the movement'joi the peljiphery of the work is alwaysin opposition to the movement of-thefhack-saw.

10. In a cutting tool, a'jsupportinglhead,

a chuckrevolubly mounted the'reon for holding the jwork,'a gear secured to said chuck, a reciprocating member having two arms, one of which is providedwi'th a hack saw arranged to, engage the y'vork; and thefother of which is provided with a rackffor' engaging said gearand a. plate arranged to" be clamped to the jfaceaof the" head and form'- ing therewith guideways for 'holding'the rack arni engagement with the gear and for guiding the arm carrying the cutting edge. a .n I

11. In a cutting tool, a supportin head, a

chuck revolubly mounted thereon or hold-n ing the work, a; gear for rotating the chuck,

- alongitudinally movable member provided with two horizontalarms, one of which is provided witha cutting edge for" engaging and a plate arranged to be clamped to the face of the tool and forming] therewith a guideway for holding: said'rackbar in engagement with said gear," and also 'forming therewith a guideway for the arm carrying the cutting edge; and friction rollers carried by vsaid plate for supporting the end of said work; 12." In a cutting tool, a supporting head, a

v chuck revolubly mounted thereon tor holding thehwork, means for rotating the chuck comprising a longitudinally movable member provided with a cutting edge for engaging the work, andia member arranged to be secured to vthe face of the headprovided with antifriction rollers for supporting the wor r a In witness whereof, I have hereunto set" my hand this28th day of January, 1913.

' CHARLES J. JOHNSON.

I Witnesses: 1

1 WM. T. RUDD,

F. Coscnovn,

Copies of this patent inay be obtained for five cents each, byiaddressing the Commissioner of Patents,

. 1 F Washington, D. G. 

